SYMMETRIES OF THE STATIONARY EINSTEIN-MAXWELL-DILATON-AXION SYSTEMстатья
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Аннотация:Sigma-model representation is derived for the stationary four-dimensional Einstein-Maxwell-dilaton-axion system arising in the low-energy limit of the heterotic string theory. Killing equations for the corresponding target space metric are solved and a closed ten-parameter algebra of isometrics is described. Finite symmetry transformations are obtained by a direct integration from infinitesimal ones. They include Ehlers-Harrison-type transformations involving dilaton and axion fields, as well as the dilaton-axion SL(2,R) duality. The solution generating technique is used to construct dilaton black holes and a stringy Kerr dyon solution starting from vacuum Schwarzschild and Kerr metrics. (C) 1995 American Institute of Physics.